#!/bin/sh

echo "输入a"
read a

b=`expr $a % 2`

if [ "$b" -eq "0" ]; then 
	echo "not odd but it is even"
else
	echo "odd"
fi

c=`expr $a % 4`
if [ "$c" -eq "0" ]; then 
	echo "可以"
else
	echo "不能被4整除"
fi
